title: Radiographic analysis of a hand-held surgical navigation system for tibial resection in total knee arthroplasty.
abstract: Tibial intramedullary or extramedullary alignment guides have not been shown to be highly accurate in performing the tibial resection in total knee arthroplasty (TKA). Since May 2010, a total of 42 knees underwent a TKA using a hand-held, accelerometer-based surgical navigation system for performing the tibial resection (KneeAlign; OrthAlign Inc, Aliso Viejo, Calif). Postoperative standing anteroposterior hip-to-ankle and lateral knee-to-ankle radiographs demonstrated that 97.6% of the tibial components were placed within 90° ± 2° to the mechanical axis in the coronal plane, and 96.2% of the components were placed within 3° ± 2° to the mechanical axis in the sagittal plane. The KneeAlign greatly improves the accuracy of tibial component alignment in TKA.
authors.affiliation: Adult Reconstruction and Joint Replacement Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, New York 10021, USA.
authors.forename: Denis
authors.initials: D
authors.lastname: Nam
authors.forename: Seth A
authors.initials: SA
authors.lastname: Jerabek
authors.forename: Bryan
authors.initials: B
authors.lastname: Haughom
authors.forename: Michael B
authors.initials: MB
authors.lastname: Cross
authors.forename: Keith R
authors.initials: KR
authors.lastname: Reinhardt
authors.forename: David J
authors.initials: DJ
authors.lastname: Mayman
mesh_terms: D000368:Aged; D000843:Ankle Joint / Q000000981:diagnostic imaging; D001172:Arthritis, Rheumatoid / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods; D001696:Biomechanical Phenomena; D017760:Bone Malalignment / Q000000981:diagnostic imaging* / Q000517:prevention & control; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D011446:Prospective Studies; D011859:Radiography; D012086:Reoperation; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*; D013977:Tibia / Q000000981:diagnostic imaging* / Q000601:surgery*; D016896:Treatment Outcome